Femtosecond laser inscription of Bragg grating waveguides in bulk diamond.
Bharadwaj V., Courvoisier A., Fernandez TT., Ramponi R., Galzerano G., Nunn J., Booth MJ., Osellame R., Eaton SM., Salter PS.
Femtosecond laser writing is applied to form Bragg grating waveguides in the diamond bulk. Type II waveguides are integrated with a single pulse point-by-point periodic laser modification positioned toward the edge of the waveguide core. These photonic devices, operating in the telecommunications band, allow for simultaneous optical waveguiding and narrowband reflection from a fourth-order grating. This fabrication technology opens the way toward advanced 3D photonic networks in diamond for a range of applications.